Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2023   10:51:25   (   0.02,-136.99) (   0.98,-141.31)  491.81                80
 04/10/2023   10:32:39   (   0.02,-136.98) (  -0.02,-136.77)   23.97                80
 04/12/2023   22:33:07   (  -0.01,-136.94) (  -0.14,-137.53)   67.51                80
 04/13/2023   22:17:00   (  -0.01,-136.92) (   0.87,-132.99)  447.79                80
 04/15/2023   10:36:05   (   0.01,-136.90) (   0.30,-138.26)  154.12                80
 04/16/2023   10:19:59   (   0.02,-136.88) (  -0.71,-133.72)  361.08                80
 04/17/2023   22:39:12   (  -0.01,-136.85) (  -0.49,-139.01)  246.36                80
 04/18/2023   22:23:06   (  -0.01,-136.83) (   0.53,-134.48)  268.59                80
 04/20/2023   10:42:11   (  -0.01,-136.80) (   0.63,-139.74)  334.09                80
 04/21/2023   10:26:05   (  -0.01,-136.78) (  -0.39,-135.20)  180.50                80